WO2022017598A1 - Alkylsilikate - Google Patents
Alkylsilikate Download PDFInfo
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- WO2022017598A1 WO2022017598A1 PCT/EP2020/070678 EP2020070678W WO2022017598A1 WO 2022017598 A1 WO2022017598 A1 WO 2022017598A1 EP 2020070678 W EP2020070678 W EP 2020070678W WO 2022017598 A1 WO2022017598 A1 WO 2022017598A1
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- WIPO (PCT)
- Prior art keywords
- radical
- radicals
- substituted
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- sio
- Prior art date
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/18—Polysiloxanes containing silicon bound to oxygen-containing groups to alkoxy or aryloxy groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
Definitions
- the invention relates to novel alkyl silicates of the average formula (I).
- Silicones are a technically very important product class that is used in numerous fields of technology.
- Technically important properties of silicones are, for example, their low surface tension and their low tendency to crystallize, which distinguishes silicones from carbon-based polymers. Silicones remain liquid over wide temperature ranges and have very low glass transition temperatures.
- silicones are very difficult to degrade in the environment due to the Si-alkyl groups they contain. This property is increasingly restricting the possible uses of silicones. There is therefore a constantly growing need for alternative materials that can in principle be hydrolytically cleaved but are nevertheless sufficiently hydrolytically stable for practical applications and which can replace conventional silicones.
- the invention relates to organosilicon compounds containing alkyl silicates containing at least 90% by weight, preferably at least 95% by weight, of alkyl silicates of the average formula (I)
- R x is a substituted or unsubstituted, C4-C20 hydrocarbyl branched at the a-carbon atom,
- R x is a substituted or unsubstituted, C5-C20 hydrocarbon radical which is dibranched at the ß-carbon,
- R x is unsubstituted or alkyl-substituted cyclopentyl, cyclohexyl or cycloheptyl having a total of not more than 9 carbon atoms; and wherein substituted in each case means that the hydrocarbyl radical has at least one functional group selected from the group consisting of vinyl radical, ethynyl radical, amino radical, epoxy radical, thiol radical and carbinol radical; and wherein the radicals R Y are independently selected from the group consisting of (i) hydrogen, (ii) methyl radical and (iii) ethyl radical; with the proviso that the molar proportion of all the radicals R Y in the alkyl silicate in a range of 0.1 to 20 mol%, preferably in a range of 1 to 15 mol%, is located, wherein the molar fraction of R Y is (i) hydrogen is at most 9 mol%, preferably at most 5 mol%, based in each case
- Alkyl silicates of the average formula (I) are preferred.
- R x is a substituted or unsubstituted, C4-C20 hydrocarbyl branched at the carbon atom
- R x is a substituted or unsubstituted, C5-C20 hydrocarbon radical which is dibranched at the ß-carbon,
- R x is unsubstituted or alkyl-substituted cyclopentyl, cyclohexyl or cycloheptyl having a total of not more than 9 carbon atoms; and wherein substituted in each case means that the hydrocarbyl radical has at least one functional group selected from the group consisting of vinyl radical, ethynyl radical, amino radical, epoxy radical, thiol radical and carbinol radical; and wherein the radicals R Y are independently selected from the group consisting of (i) hydrogen, (ii) methyl radical and (iii) ethyl radical; with the proviso that the molar proportion of all the radicals R Y in the alkyl silicate in a range of 0.1 to 20 mol%, preferably in a range of 1 to 15 mol%, is located, wherein the molar fraction of R Y is (i) hydrogen is at most 9 mol%, preferably at most 5 mol%, based in each case
- branched means that there are two carbon radicals on a carbon atom.
- dibranched means that there are three carbon radicals on a carbon atom.
- the radicals R Y independently of one another preferably mean a (ii) methyl radical or (iii) ethyl radical.
- radicals R x are preferably selected independently from radicals which meet at least one of the following conditions:
- R x is a substituted or unsubstituted C4-C10 hydrocarbon radical which is branched at the carbon atom, in particular a substituted or unsubstituted C4-Cio aliphatic hydrocarbon radical which is branched at the - carbon atom,
- R x is a substituted or unsubstituted C5-C10 hydrocarbon radical which is doubly branched on the ß-carbon, in particular a substituted or unsubstituted, aliphatic Cs-Cio-hydrocarbon radical which is doubly branched on the ß-carbon, (c) R x is an unsubstituted or alkyl-substituted cyclohexyl radical having a total of not more than 9 carbon atoms.
- radicals R x are the 2-butyl radical, the 3-methyl-2-butyl, the 3-methyl-2-pentyl, the 3-pentyl radical, the 2-hexyl radical, the 3-hexyl radical, the 2-heptyl radical , the 2-octyl residue, the
- radicals R x are the 2-butyl radical, the 3-methyl-2-butyl, the 3-methyl-2-pentyl, the 3-pentyl radical, the
- radicals R x are the
- 3-pentyl radical 2-hexyl radical, 3-hexyl radical, 2-heptyl radical, 2-octyl radical, 2,2-dimethyl-1-propyl radical, 1,1-dimethylethyl radical, 1,1-dimethylpropyl radical, der cyclohexyl radical and the 3,3,5-trimethylcyclohexyl radical.
- the indices a, b, b', c, c', c'', d, d', d'', d''' in formula (I) are independently a number in the range from 0 to 500, preferably in the range from 0 to 100, in particular in the range from 0 to 50, particularly preferably in the range from 0 to 10, with the proviso that the sum of the indices is at least 2.
- a further possibility of preparing the alkyl silicates according to the invention is to react oligomeric or polymeric methoxy or ethoxy silicates with alcohols R x OH, if appropriate in the presence of a catalyst, the radical R x being selected from radicals which have one of the radicals for R x in formula ( I) meet the conditions mentioned.
- suitable catalysts are alkali metal hydroxides, such as KOH, or sodium methoxide.
- the compounds according to the invention are hydrophobic, as shown by hydrophobicity tests, and have a low surface tension.
- the compounds are also stable to hydrolysis and thermostable. For example, no condensation of the Si-OH groups to Si-O-Si was observed at 140°C.
- the compounds according to the invention can be prepared in a simple manner, they have silicone-like low surface tensions and low glass transition temperatures and can be used in particular where silicones are used, for example in the areas of hydrophobing, anti-foam, textiles, cosmetics, building protection and household care
- the molar proportions of the groups R x and R Y are determined via 1 H-NMR spectroscopy by integrating the characteristic O-CH2-CH 3 , O-CH3 and -OH groups.
- the composition of the ethyl silicates used and the products formed was determined using 29 Si NMR spectroscopy.
- the surface tension g was determined at 20°C using the hanging drop method.
- the glass transition temperature was determined by differential thermal analysis.
- the dynamic viscosity h was determined at 20° C. using a Stabinger rotational viscometer SVM3000 from Anton Paar.
- the hydrophobicity test was carried out as follows: A cementitious plaster panel was coated twice in succession with the alkyl silicates produced. After 2 hours, a drop of the alkyl silicate was placed on the coated plasterboard and the change in the shape of the drop was monitored at room temperature after the task.
- Silicate TES 34 an ethyl silicate containing 34% by weight SiCh, is prepared by hydrolytic condensation of 850 g of tetraethoxy silicate with 38 g of water in the presence of ethanol and HCl.
- Example 1 Preparation of an alkyl silicate containing 92 mol % of 2,2-dimethyl-1-propyl groups and 8 mol % of hydrogen groups 10.4 g (118 mmol) of 2,2-dimethyl-1-propanol were dissolved in 56 g of methyl tert butyl ether dissolved and treated with 9.8 g of pyridine. This solution was added dropwise to a stirred solution of 10.0 g (59.1 mmol) of silicon tetrachloride in 27 g of methyl tert-butyl ether over a period of 40 minutes, the temperature being in the range from -15.degree. C.
- Tg -27°C.
- the hydrogen group content was unchanged after heating the product at 140°C for 2 hours.
- a cementitious plaster board was impregnated with the manufactured product and showed water-repellent (hydrophobic) properties.
- the hydrophobic value is: + .
- T g -130°C
- h 23.2 mPa - s
- g 22.3 mN/m.
- a cementitious plaster board was impregnated with the manufactured product and showed very good water-repellent (hydrophobic) properties.
- the hydrophobic value is: ++ .
- hydrophobic value of the WACKER® SILICATE TES 40 WN used is: 0 .
- hydrophobic value of a trimethylsiloxy-terminated polydimethylsiloxane with a viscosity of approx. 35 mPa -s is: ++ .
- the hydrophobic value is: ++ .
- Example 5 Production of an alkyl silicate with 3,3,5-trimethylcyclohexyl groups 190.2 g (1.34 mol) 3,3,5-trimethylcyclohexanol, 83.8 g (1.09 mol) WACKER® SILIKAT TES 40 WN, ( contains 1.09 mol of ethoxy groups) and 81 mg of sodium methoxide are placed in the flask. The ethanol formed during the reaction is distilled off, the bottom temperature increasing to 200° C. in the course of the reaction.
- 3,3,5-Trimethylcyclohexanol is determined by gas chromatography using naphthalene as the standard. The salary at
- 3,3,5-trimethylcyclohexanol is 0.16%.
- Example 7 The reaction in Example 7 is repeated with 220 mg of Tonsil® (acid-activated fuller's earth). The salary at
- 3,3,5-trimethylcyclohexanol is 0.67 mol%.
- Example 7 The reaction in Example 7 is repeated with 2.08 g of sodium acetate, resulting in a pH of 8.8.
- 3,3,5-trimethylcyclohexanol is 0.29 mol%.
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Silicon Polymers (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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KR1020227044448A KR20230015396A (ko) | 2020-07-22 | 2020-07-22 | 알킬 실리케이트 |
US18/016,694 US20230272166A1 (en) | 2020-07-22 | 2020-07-22 | Alkyl silikate |
JP2023504349A JP2023535412A (ja) | 2020-07-22 | 2020-07-22 | アルキルシリケート |
EP20745172.5A EP4107210B1 (de) | 2020-07-22 | 2020-07-22 | Alkylsilikate |
PCT/EP2020/070678 WO2022017598A1 (de) | 2020-07-22 | 2020-07-22 | Alkylsilikate |
CN202080099802.6A CN115427482B (zh) | 2020-07-22 | 2020-07-22 | 烷基硅酸酯 |
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PCT/EP2020/070678 WO2022017598A1 (de) | 2020-07-22 | 2020-07-22 | Alkylsilikate |
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WO2022017598A1 true WO2022017598A1 (de) | 2022-01-27 |
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US (1) | US20230272166A1 (de) |
EP (1) | EP4107210B1 (de) |
JP (1) | JP2023535412A (de) |
KR (1) | KR20230015396A (de) |
CN (1) | CN115427482B (de) |
WO (1) | WO2022017598A1 (de) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2758127A (en) | 1953-12-30 | 1956-08-07 | California Research Corp | Method of preparing silicon esters by reacting an alkoxysilanol with an alkoxysilamine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1253274A (en) * | 1969-02-11 | 1971-11-10 | Monsanto Chemicals | Production of alkyl silicates by electrolysis |
US5391673A (en) * | 1993-12-30 | 1995-02-21 | Dow Corning Corporation | Silicon resins and methods for their preparation |
JP5819787B2 (ja) * | 2012-07-19 | 2015-11-24 | 信越化学工業株式会社 | 硬化性シリコーン樹脂組成物 |
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2020
- 2020-07-22 CN CN202080099802.6A patent/CN115427482B/zh active Active
- 2020-07-22 WO PCT/EP2020/070678 patent/WO2022017598A1/de unknown
- 2020-07-22 JP JP2023504349A patent/JP2023535412A/ja active Pending
- 2020-07-22 KR KR1020227044448A patent/KR20230015396A/ko active Search and Examination
- 2020-07-22 US US18/016,694 patent/US20230272166A1/en active Pending
- 2020-07-22 EP EP20745172.5A patent/EP4107210B1/de active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2758127A (en) | 1953-12-30 | 1956-08-07 | California Research Corp | Method of preparing silicon esters by reacting an alkoxysilanol with an alkoxysilamine |
Non-Patent Citations (4)
Title |
---|
ABE ET AL., BULL. SOC. CHIM., vol. 42, 1969, pages 1118 |
ABE YOSHIMOTO ET AL: "Alkoxysilanes. II. Preparation of (tributoxysiloxy)chlorosilanes and silanols, and their polymeric substances", BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN,, vol. 42, no. 4, 1 April 1969 (1969-04-01), pages 1118 - 1123, XP009102304, ISSN: 0009-2673, DOI: 10.1246/BCSJ.42.1118 * |
OKAWARA ROKURO ET AL: "Alkylalkoxypolysiloxanes. II. Ethylisopropoxypolysiloxanes", BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, vol. 27, no. 9, 1 September 1954 (1954-09-01), pages 582 - 585, XP055793771, ISSN: 0009-2673, DOI: 10.1246/bcsj.27.582 * |
OKAWARA ROKURO ET AL: "Isopropoxypolysiloxanes", BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, vol. 27, no. 1, 1 January 1954 (1954-01-01), pages 45 - 46, XP055793773, ISSN: 0009-2673, DOI: 10.1246/bcsj.27.45 * |
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Publication number | Publication date |
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US20230272166A1 (en) | 2023-08-31 |
JP2023535412A (ja) | 2023-08-17 |
EP4107210B1 (de) | 2023-09-20 |
CN115427482B (zh) | 2023-10-24 |
CN115427482A (zh) | 2022-12-02 |
KR20230015396A (ko) | 2023-01-31 |
EP4107210A1 (de) | 2022-12-28 |
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